TY  - BOOK
AU  - Webb, John W.
AU  - Webb, John W.Programmable logic controllers : principles and applications
TI  - Programmable logic controllers :  principles and applications    
SN  - 9788131707036
AV  - 629.89 WEB 2003 
U1  - 629.89 WEB 2003 
PY  - 2003///
CY  - New Delhi
PB  - Prentice-Hall
KW  - Instrumentation and Control
ER  -